-15% damage to everyone hit, -% armor (stack it with your E's % armor reduction as well), applies a bit of a slow, and have your -aspd aura. You basically become a walking team debuffer.

Throw in a bulwark for the added tankiness (build lacks MR) and you become a big tanky crab dude who's crippeling the enemy team while buffing yours. Yes, your own damage will be meager, but that's not the point of this build. Hell, build a malady for even more laughs.